DiMarzio LiquiFire Humbucking Pickup - Black Wiring: 4-conductor Magnet: Alnico V Output: 300mV DC resistance: 10.75k ohms Year of introduction: 2009 He used this pickup throughout Dream Theater's tenth studio album, Black Clouds & Silver Linings He wanted a neck pickup with a flowing, singing solo tone when used with a heavily overdriven amp, plus a clear chord sound with a clean amp setting Recommended for the neck position but can also be used in the bridge position One thing has stayed consistent throughout John Petrucci's long and successful career: the DiMarzio pickups in his guitars